Use a reasonable sized buffer when formatting log messages

5 jobs for wip/structured-logging in 25 minutes and 27 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #341049
fedora

00:12:08

passed #341050
ubuntu

00:13:28

 
  Test
passed #341051
flatpak

00:10:41

 
  Deploy
passed #341052
review

00:00:49

passed #341053
allowed to fail manual
stop_review

00:00:28